问题标题:
关于偶数与奇数的问题(英语的)我在美国上初二-帮我看看1.Ajustificationthatusesonlicounterexamplesshouldnotconvinceyouthatastatementisnevertrue.Saywhy.请用英语回答
问题描述:
关于偶数与奇数的问题(英语的)
我在美国上初二-帮我看看
1.Ajustificationthatusesonlicounterexamplesshouldnotconvinceyouthatastatementisnevertrue.Saywhy.
请用英语回答
陈寅寅回答:
Counterexampleisanexamplethatisusedtodisproveastatement,itprovesthatastatementisnotALWAYStrue,butitcannotproveastatementisNEVERtrue.
Hereisanexample:'Theoppositeofanumberisalwayspositive.'
Counterexamplefortheabovestatement:Theoppositeof2is-2,anegativenumber.ButasIsaid,thiscounterexamplecannotproveabovestatementisNEVERtrue-Theoppositeof-2is2,whichistrue.
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